Means for preventing remixing of separated liquids



H. O. LINDGREN MEANS FOR PREVENTING REMIXING OF SEPARATED LIQUIDS Filed July 20, 1923 InVemZ-or" B1 1M wM fl%t' ys.

Patented Dec. 2, 1924-.

UNETE I 1,517,441 rarest G-FFEGE; i

Hens OLOF Lrnnennri, or s-"rocx'norirr, swnnnrr, assienearr MESNE Ass smvI-rmrs'j TO THE nu nevarxsnraaaroze oorrrany, or new 'ZGR-K, N. Y., A coarortiarron on NEW JERSEY.

MEANS FORYP REVENTING- REB ZIIHN'G OE SEP ARATED LIQUIDS.

Application file'dfi'uly 20 To all whom it may concern: I,

Be itknown that I, l'IANS-OLOF LINDGREN, a subject of the King; of Sweden, residing at Fleminggatan 8, Stockholm, Sweden, have invented certain new and useful Improvement in Means for Preventing liemixing of Separated Liquids, of which the following is a specification. 7 I r i M In centrifuges for the separation of liquids it is common practice that the separated liquid or liquids are drawn off from the bowl of the centrifuge through openings which are free or provided with regulating means,; said liquid or liquids being collectedin vessels disposed about thebowL Owing to the high speed of. rotation of the centrifuge bowl the escaping liquids are then atomized byithe friction in the air into a fine vapour which maybe easily carried from one vessel' to another by aprevailing air currents. Thuslthe result of the centrifugal process may be disadvanta eously infiuenced, which may cause great drawbacks, particularly in such cases where a liquid has to be purified froinanother in the high est possible degree,;as for instance in the separationof skimqnilk from crea1n v I i The present invention has for its object to avoid such remixing ofl the liquids by producing powerful air ,currents issuing from the collecting vessel for collection of the liquid which is particularly liable to suffer by remixing, to the/vessel for collec-' tion of the liquid from which the first-mentioned liquid is to" beliberated as far as possible. Thus, for instance, where a mill:

separator is considered, it is a question of producing a powerful air current "from the collecting vessel for the skim-milk to the collecting vessel for the cream; VVhere a separator is considered which is adapted to liberate oil from water, the air current should be consequently directed from the oil vessel to the water receptacle It is previously known fromcentrifuges to produce an air current from the casing surrounding the bowl to thecenter of the sheet-metal cover disposed on sa-id casing by the arrangement of ridges on the side of the cover facing the'bowl, such rid es preventing the air from taking part in, the r0- tation of the bowl and thus obviating the ensuing of a centrifugal force (compar the Swedish Patent No. 27,300). lhis ar- 1e23, Serial No. 652,812.

rangernent which is entirely satisfactory foif its purpose, that is to say for preventing moisture and spattering water from penetrating down to the bowl, is not, howevi suitable for the above-mentioned object. The fact is that if such ridges were dis posed within a vesselreceiving liquid the bowl of thecentrifiige, a powerful i pact would be causedbetween, the escaping liquid and the ridges, resulting partly in the liquid being still lllOiG atomized, and partly in the flow of air being disadvan tageously influenced. Moreover, if were disposed in some otherplace thanin, the space between the bowl and the,.v e sel immediately joining thesanie, thus f I stance on the lower side of partition between the skim-milk cover and the cream cover, the available. rotation of the air would be rather weak, for reasons easily understood, and the effect of the ridges would thus be rather trifling. I p

v According to the present invention, an embodiment of which is diagraniniaticall shown in the accompai ying drawing tliese difficulties are overcome by the arran e-f ment ofan additional partition "ovidig a close chamber in whichi tl e air a; may form without being'distu d ing liquids. The partition also, has for its purposeto prevent ,thea tonition offthe liquid which would take puse, @ass 15 the liquid hitting the ridges provided diy. a a

The invention is' distinguished by the that one or both of the bettoins separating the collecting vessel for the liquid,thefen trance of which into another vessel isgto be prevented, from adjacent parts of the con trifuge, is provided with a partition at or in the proximit y of its central holeand' on that side which is turned away fro rthe inside ofthe collecting vessel; said partition being, arranged somedistan ce: from the bottom, so as to provide a space between the partition and the bottom,whicli spaeeis protected from the liquid flowing out of the bowl of the centrifuge,

Between the said bottom and the partitieii there may be arranged ridges di oiosed radially spirally, or, in some other In the drawing, A denotes tliel se bowl rotatingwithin thecasing "Pla er l M s above the bowl is the vessel G adapted to receive the skim-milk flowing out through the opening I). Between the bowl A and the vessel G there may be arranged ridges E in known manner, said ridges producing an upwardly directed air current through the central hole of the vessel C. Placed on top of the skim-milk vessel C is the cream vessel F, into which the cream flows through the opening G. To prevent the fine cream vapour from penetrating through the hole in the partition between the skim-milk vessel and the cream vessel into the former, there is arranged an additional partition I near the underside of the first-mentioned partition, a number of ridges H of suitable form being also provided between the main partition and the additional partition, if de sired. Under the influence of the bowl neck protruding into the milk vessel and through the action of the issuing milk, the air within the milk vessel is caused to rotate in a certain degree, such rotation bringing about an increased pressure toward the parts of the apparatus situated farther oli from the center. As the air between the bottom of the cream vessel and the partition is to a certain extent protected from taking part in the rotation and is, broadly speaking, entirely prevented therefrom, particularly in the case of ridges being provided, the centrifugal force of this quantity of air being thus smaller than in the freely rotating body of air, apowerful air current will be produced inwards toward the cream vessel. At any rate, this air current will prevent fine cream particles from spattering down to the skim-milk and from remixing therewith. The action will be altogether the same in the case of centrifuge for the treatment of liquids other than milk.

What I claim as new and desire to secure by Letters Patent of the United States of America is:

1. In acentrifugal machine for separating liquids of different specific gravities in combination, a bowl provided with openings for the passage of separated liquids, collecting vessels for the separated liquids disposed about said bowl, said vessels being separated by a partition, and a second partition secured in spaced relation to said first mentioned partiti.on,.the space between said partitions being in communication with the vessel in which said second partition lies, at points remote from and adjacent to the cenhe of said vessel.

2. In a centrifugal machine for separating liquids of different specific gravities, in combination, a bowl provided with openings for the passage of separated liquids, collecting vessels for the separated liquids disposed about said bowl, a partition between said vessels, a second partition supported by said first mentioned partition,

the space between said partitions being in communication with the interior of the vessel in which said second partition lies at a point remote from the centre of said vessel and in communication with the other of said vessels at a point relatively near the periphery of said bowl.

3. In a centrifugal machine for separating liquids of different specific gravities, in combination, a bowl provided with openings for the passage of separated liquids, collecting vessels for the separated liquids disposed about said bowl, a partition between said vessels provided with a central aperture affording communication between said vessels, a second partition supported by and spaced from said first mentioned pr; tition, the space between said partitions being in communication with the vessel in which said second partition lies at a point remote from the centre thereof and in communication with the central aperture in said first mentioned partition whereby due to the differential pressures at points remote from and adjacent to the centre of said vessel a current of air willbe set up in said space and travel from one vessel to the other.

4. In a centrifugal machine for separating liquids of different specific gravities, in combination, a bowl provided with openings for the passage of separated liquids, collecting vessels for the separated liquids disposed about said bowl, a partition between said vessels, a second partition secured in spaced relation to said first mentioned partition, and a plurality of radially extending vanes between said partitions, the space between said partitions being in cont munication with the vessel in which said second partition lies at points remote from and adjacent the centre of said vessel.

5. In a centrifugal machine for separating liquids of different specific gravities, in combination, a bowl provided with openings for the passage of separated liquids. collecting vessels for the separated liquids disposed about said bowl, a partition be tween said vessels, a second partition secured in spaced relation to said first mentioned partition, and a plurality of radially extending spiral vanes between said partitions, the space between said partitions being in communication with the vessel in which said second partition lies at points remote from and adjacent the centre of said vessel.

In testimony whereof I affix my signature in presence of two witnesses HANS OLOF LINDGBEN. Witnesses:

J. H. Nnuno'rn, H. L. KJELLBERG. 

